Pulsator-operated liquid-feed tank



Patented Feb. 15, 1927.

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LEONARD I-I. WHEELER; OF CIHICAGD, ILLITL'Q'QIS, ASSXGNOR TO STEVJJ-LItT-VQTA13230113fc't SPEEDOMEIER CORPORATION, OF CHICAGO, ILLINOIS, A G GBFORATION OF VIR- GINIA.

PULSATOR-OPERATED LIQUID FEED TANK.

Application filed April 17, 1922. Serial No. 554,073. Renewed July 12, 1926.

The purpose of this invention is to provide an improved construction of a device to be operated by a pulsator .or the like, for supplying liquid fuel from a low source 6 to a receptacle from which it may be delivered to the carbureter by gravity flow. It consists in the elements and features of construction shown and described, as inclicated in the claims.

In the drawings Figure 1 is a diagrammatic representation of a device embodying this invention in its relation as to the relative elevation of the parts, viz., the low level source; the elevated receptacle; the pulsator, and the carburcter.

Figure 2 is a vertical axial section of a chamber and connections comprising the characteristic features of the invention.

Figure 3 is a side elevation of the con struction shown in Figure l,"showing the parts at the low liquid level of the elevated receptacle.

Figure 1- is a detail plan view of the snap 25 action connection of the air inlet valve.

In the drawings, 1 represents the main supply tank which constitutes the low level source ofthe fuel. 2 represents conventionally a pulsator or means of producing alternate compression and rarefication in the conduit with which it is connected. 8 is the elevated receptacle to which the liquid fuel is to be lifted by the device, for delivery to the carbureter, 4, by gravity flow.

The pulsator may be of any form .for

roducing alternate compression and rare- FlCfLtlOIl in the conduit, 5, with which it is connected. It may be actuated in any convenient manner suitable to its specific character. As shown, in the drawings, Figure 1 may be understood as representing a plunger, 6, reciprocated by crank-and-pitman connection, 7, from any rotating shaft, 8, said plunger being reciprocated back and as to its connection with the conduit, 5. Said conduit, 5, which leads to the upper chamber, 10, of a bi-cameral receptacle, having also a lower chamber, 11. Said chant forth in apiston chamber, 9, closed exceptturn valve, 14. The chamber, 11, has atmos to the atmosphere above it. The chamber,

10, has an atmosphere inlet at 16, controlled by a valve, 17, which seats in the direction ot' atmosphere inflow, being exterior to the chamber, 10. This valve is connected for operation with a snap action of familiar construction comprising two levers, 18 and 19, pivoted at a common fulcrum, 20, connected by a spring, 21, stretched past the pivot axis, so that when the lever, 19, which is connected as described, for operation by a float, 22, in tie chamber, 11, is moved past the fulcrum axis, the lever, 18, which is connected with the atmosphere inlet valve, 17, snaps past the fulcrum for actuating the valve, 17, in one direction or the other with instantaneousmovement and complete throw for opening or closing, as the case may be. The float, 22, in the chamber, 11, has its stem, 25,.extending out through the atmosphere vent passagein the sleeve, 15, for connection with the lever, 19, as stated. The chamber, 11, it will be understood, is connected by a pipe, 27, with the carbureter, 4. The low level. tank, 1, is connected by a pipc,28, for delivering liquid fuel into the chamber, 10, past the non-return check valve, 12.

The operation of this construction is as I in the upper chamber, 10, of the bi-cameral receptacle, will upon each rareiication cause liquid to be drawn from the tank, 1, eventually filling the pipe, 28, and flowing into the chamber, 10. The compression stroke of the pulsator causing the same to be dis charged past the check valve, 14, into the chamber, 11, causing the discharge of an equivalent volume of air from the chamber, 11, through the vent sleeve, 15, around the float stem, 25. As the process continues, eventually the chamber, 11, becomes filled, (assuming that the rate of operation is more rapid than necessary to supply the carbureter). and when the float 22, is lifted by the rise of liquid in the chamber, 11, to a point at which its stem carries the outer end of the lever, 19. past the lever fulcrum, the snap action will cause the atmosphere inlet valve, 17, to be opened; and thereafter, further suction strokes of the pulsator will draw in air through the atmosphere inlet, instead of drawing liquid from the low receptacle, 1; and the device will be inoperative for further pumping of the liquid until the delivery of fuel to the carbureter lowering the level in the chamber, 11,

causes the float therein'to descend far enough to swing the snap action levers past their fulcrum in the opposite direction, which will cause the valve, 17. to be seated; whereupon the pumping action will be resumed and the cycle of movement above described repeated.

I claim 1. In combination with a low level source of liquid fuel, means for producing alter nately compression and rarefication in a conduit; a unitary bicameral receptacle of which one chamber is in communication with the fuel source, with the conduit, and with the other chamber; one-way-opening valves at the first and last of said communications both located interiorly with respect to said receptacle; the valve at the last communication opening for discharge from the same; said first chamber having an atmospheric vent and a valve thereat; a float in the second chamber having its stem extended through the atmospheric vent. thereof, and a snap action device outside the receptacle for connecting the float stem with the atmospheric vent valve for opening said valve at a predetermined high level of liquid in the second chamber.

2. In combination with a low level source of liquid fuel, means for producing alternately compression and rarefication in conduit; 21 bi-cameral receptacle of which one chamber is in communication with a fuel source with a conduit and with the other chamber; one-way opening vaives at the first and last of said communications, the valve at the last mentioned communication opening for discharge therefrom, said first mentioned chamber having a atmospheric vent and a valve thereto; a float in the second chamber, and means connecting the float with the atmospheric vent valve for opening said valve at a predetermined high level of liquid in the second chamber.

3; In the construction defined in claim 2 foregoing, the vent valve being located exteriorly of both said chambers, the second chamber having also a vent; the connection from the float to said vent valve comprising a stem extending from the float out through the atmospheric vent thereof.

4. In the construction defined in claim 2, foregoing, a snap action device for communicating the movement of the float to the vent valve located outside both said chamhers.

5. In the construction defined in claim 2, foregoing, the second chamber having an atmospheric vent, a post projecting from the bottom of the first mentioned chamber up through the same, and having a longitudinal aperture extending through its entire length constituting the vent for the second chamber, whereby said vent constitutes a sealed passage from the second chamber through the first to the atmosphere, the vent valve being exterior with respect to the second chamber and operating connections from the float to said vent valve comprising a stem extending loosely through said sealed passage.

In testimony whereof. I have hereunto set my hand at Chicago, Illinois, this 14th day of April, 1922.

LEONARD .I-I. IVHEELER 

